I have found an issue with Studio (1.5.3). I only realized it recently but when opening a TIFF file with a given color profile, in this case Pro Photo, it saves the file as sRGB!!!Same happens if the file is AdobeRGB. NOT GOOD!

Could you supply a little more info such as PC environment (Mac/Win) etc., and if you are using File-> Save or Save As ... in my case I get the following dialog every time I save or save as where I can select the color space, etc. ...